package com.atguigu.springcloud.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import com.atguigu.springcloud.service.PaymentService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

@RestController
@Slf4j
public class CircleBreakerController {
    public static final String SERVICE_URL = "http://nacos-payment-provider";

    @Resource
    private RestTemplate restTemplate;

    @RequestMapping(value = "/consumer/fallback/{id}")
    //@SentinelResource(value = "fallback",fallback = "handlerFallback")// 只负责业务异常
    //@SentinelResource(value = "fallback",blockHandler = "blockHandler")
    @SentinelResource(value = "fallback",blockHandler = "blockHandler",fallback = "handlerFallback")
    public CommonResult<Payment> fallback(@PathVariable("id") Long id){
        CommonResult result = restTemplate.getForObject(SERVICE_URL + "/paymentSQL/" + id, CommonResult.class, id);
        if (id == 4) {
            throw new IllegalArgumentException("IllegalArgumentException,非法参数请求");
        }else if (result.getData() == null){
            throw new NullPointerException("NullPointerException,该ID无记录，空指针异常");
        }
        return result;
    }

    // 兜底得方法 业务异常
    public CommonResult<Payment> handlerFallback(@PathVariable("id") Long id,Throwable e){
        Payment payment = new Payment(id, null);
        return new CommonResult<>(444,"发现兜底异常，exception得内容是："+e.getMessage(),payment);
    }

    //兜底得 配置异常方法
    public CommonResult<Payment> blockHandler(@PathVariable("id") Long id, BlockException blockException){
        Payment payment = new Payment(id, null);
        return new CommonResult<>(445,"blockHandler-sentinel限流了"+blockException.getMessage(),payment);
    }


    // openFeign
    @Resource
    private PaymentService paymentService;

    @GetMapping(value = "/consumer/paymentSQL/{id}")
    public CommonResult<Payment> paymentSQL(@PathVariable("id") Long id){
        return paymentService.paymentSQL(id);
    }
}
